Joiiann jakob rittee



(No Model.)

J. J. BITTER. ELECTRIC. SOLDERING TOOL.

Patented Mar. 1 1892.

W?) Z n ewes c /Zwxam a 1/ 021/509": Mal r 4 W UNITED STATES PATENTOFFICE.

JOIIANN JAKOB BITTER, OF BASLE, SIVITZERLANI).

ELECTRIC SOLDERlNG-TOOL.

:L ECIFICATION forming part of Letters Patent No. 469,949, dated March1, 1892.

Application filed August 27, 1891. Serial No. 403,910. (No model.)Patent-etlin $witzerland August 19, 1890, No. 2,565, and in EnglandApril9, 1891, No. 6,125.

To aZZ whom it may concern.-

Be it known that I, J OHANN JAKOB BITTER, a citizen of the Republic ofSwitzerland, and a resident of Basle, Switzerland, have invented certainImprovements in Electrical Apparatuses for Soldering, Boiling, andHeating, (for which patents have been granted to me in Switzerland, No.2,565, dated August. 19,1890, and in Great Britain, No. 6,125,datedApril 9, 1891,) of which the following is a specification.

My invention relates to a portable apparatus adapted for heatingpurposes, the heating agent being an electric arc. The invention will befully described hereinafter, and its novel features carefully defined inthe claims.

In the accompanying drawings, which serve to illustrate my invention,Figure l is a longitudinal mid-section of an electrical heatingapparatus embodying my improvements, and Fig. 2 is an elevation of theoperative end of the same, showing a soldering-bit in position therein.Figs. 3, i, 5, and 6 are transverse sections taken in the respectiveplanes inclioated by the lines V \V, X X, Y Y, and Z Z. Figs and 8 areviews illustrating the application of my apparatus to boiling liquidscontained in vessels; and Fig. 9 is a similar view 'to Fig. '7,illustrating the application of my invention to heating articles ingeneral.

Generally speaking, my apparatus comprises a solenoid with a movableiron core of tubular conical form attached to a metal tube, on the endof which are clampingfingers which embrace a carbon-rod. The tube alsocarries limiting jaws or stops of porcelain or other refractorymaterial, up to which the tip of the carbon is kept pressed by a springas it burns away. The spring is arranged behind the carbon in the tube.The coil of the solenold is embraced by and mounted in a wooden casing,and this casing has a metallic prolonga tion, which is perforated andextends out over and beyond the tip of the carbon, where it has a socketor holder to receive the solderin g-iron or other body to be heated,thelatter having in it a recess or slot to receive a metal bar,betweenwhich and the carbon the arc is formed. One extremity of the wire coilof the solenoid is connected with one pole of an electric generator,while the other end is-Eonnected electrically with the aforesaidmetallic bar. The carbon-rod is connected with the other pole of thegenerator. The tubular holder of the carbon-rod is kept pressed forwardhabitually by a spring, which keeps the tip of the carbon in contactwith the metal bar, and when a current from the generator is sentthrough the circuit, closed normally at the point where said metallic.bar is in contact with the carbon, the core of the solenoid is drawnback within the coil, thus drawing back the carbon-rod, and a continuousspark or are passes between the carbon and the metallic bar thusseparated.

I will now describe the construction more particularly with reference tothe accompanying drawings.

A is the bobbin 'of the solenoid and B the coil of the same, which isembraced by a tubular casing C of wood or the like. This casing servesas a handle to be grasped by the hand of the user. On the front, end ofthe bobbin A is secured a metal disk D, by means of lugs 00, and to thedisk D is secured an insulatin g piece E of slate, porcelain, or thelike. To the piece E is secured a metal collar F, to which is secured aperforated casing F. In the outer end of the casing F is secured, bymeans of screws g a socket piece or holder G, which is V-shaped, and isprovided with external projections, and between the upturned edges gotthe socket is placed or inserted the copper soldering-bit H, which has aprojecting part adapted to enter the socket in the socket-piece. In thepart which is inserted into the socket G this solderingbit H is providedwith a slot 9- for the reception of the metallic bar I, beforementioned,

which is clamped fast in said slot by a screw The soldering bit and barI are both held in place in the socket by this screwj;

The electrical connection between the rod I and the wire of the coil iseffected by means tallic bar I-is united to the negative pole of thecarbon-rod M. The tube L is provided at its rear end with a screw-cap Z,which closes it, and at its other or front end it is slitted to formspring clamping-fingers, which embrace the carbon, insure a goodcontact, and steady it. Back of the carbon in the tube L is a spring m,which constantly tends to press the carbon forward against porcelainjaws or limiting-stops m, secured to the tube L through the medium of ametalmounting m and a disk m of slate or other like material.

To guide the core K in itsmovement and to prevent it and its attachedparts from rotating axially when the cap Z is manipulated, the core isprovided with two studs e, which embrace somewhat loosely a rib e on thebobbin A,

A coiled spring 11, arranged about the tube L, between a collar nthereon and. the end of a tubular projecting metal part at on the bobbinA, which incloses said spring, serves to press the tube, carbon, andcore forward, the latter out from the cavity in the bobbin, and at thesame time it presses the tip of the carbon-rod up to the end of themetallic bar I. Rollers cl are attached to the disk D and rest on thetube L, and these facilitate the movements of the core, and serve alsoas conductors. A similar roller d is also mounted on the'bobbin A, forthe same purpose. Moreover one wire of the conductor N, which entersthrough an opening at the rear of the casing C, from the electricgenerator is by means of the roller (1 put into connection with the tubeL and the carbon-rod at the same time, inasmuch as the end of theabovenamed wire is connected with the projecting part at of the bobbinby means of the screw 2, while the other wire of conductor N isconnected at z with the other end of the wire, forming the coil B of thebobbin.

The wire connected with the carbon-rod M is united to the positive poleof the electric generator, while the other wire-that is, the wire whichconnects electrically with the methe generator.

The handle 0 may be closed at the rear end by a removable cap a.

In order to use this apparatus for soldering, the two wires of theconductor N, are connected with the poles of the generator, and as soonas the electric current from the latter is 7 and 8. Any sort ofcooking-vessel may be set on the diskO as on a stove; or, if an articleis to be heated for any purpose, the heating-plate T (seen in Fig. 9)may be substituted for the bit H or disk 0. This plate T may have aparabolic form and be provided with projecting points or parts i forincreasing the heating-surface.

Whatever form the article to be heated mayhave, it will have a branch orpart constructed to fit into the socket G and be adapted to receive themetallic bar I, being held in contact with the later.

Having thus described my invention, I claim- 1. In an electricalapparatus for heating purposes, the combination, with the solenoid andthe casing in which it is mounted, of the carbon-carrying tube L,extending through and fixed to the movable core of the solenoid andprovided with refractory limiting jaws or stops for the carbon-rod, thesaid carbon- .rod, a spring arranged in said tube behind said carbon-rodto press'it up to said stops, a metal casing F, provided with asocket-piece G to receive and hold the article to be heated, themetallic bar I, having its end or point adjacent to the end or point ofthe carbon-rod, and the spring n, arranged to keep the tube L pressedforward normally, so that the carbon-rod will be in contact with the barI, as set forth.

2. In an electrical heating apparatus, the combination, with thesolenoid havinga conical movable core K, of the carbon-carrying tube L,extending through said core longitudinally and secured rigidly thereto,limiting-stops for the carbon-rod mounted on said tube, the saidcarbon-rod mounted movably in said tube, the spring behind thecarbon-rod in said tube for pressing the carboniipv to said stops, thespring back of said tubefor pressing the core, tube, and carbon-rodforward normally, the casing which supports the socket-piece or holderG, and the said socket or holder, substantially as set forth.

3. An electrical heating apparatus having a holder or socket-piece G,provided with a clamp-screw j, in combination with an article to beheated by said apparatus, having-a part adapted to fit into said socket,said part having a recess or slot to receive the metallic bar I of theapparatus, and means for clamping together the said article and the barI,'substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

JOHANN J AKOB, BITTER. Witnesses: I,

GEORGE GIFFORD, CHARLES A. RICHTER,

